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PRINTING AND GALGULATING MAGHINE.

No. 568,021. Patented Sept. 22,1896.

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PRINTING AND GALGULATING MACHINE. No. 568,021. Patented Sept. 22, 1896.

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No. 568,021. Patented Sept. 22, 1896.

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Patented-Sept. 22, 1896.

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No. 568,021. Patented Sept; 22, 1896.

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(N0 Model.) 12 Sheets-Sheet 11.

D. E. FELT. PRINTING AND CALCULATING MACHINE.

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D.E.FELT., PRINTING AND CALCULATING MACHINE.

No. 568,021. Patented Sept. 22, 1896.

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DORR E. FELT, OF CHICAGO, ILLINOIS.

PRINTING AND CALCULATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 568,021, dated September 22, 1896.

Application filed une 14, 1395- T0 at whom, it may concern:

Be it known that I, DORR E. FELT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Printing and Calculating Machines, of which wheels other than in carrying was done by the operator in the act of manually depressing the keys, which were made to actuate the segment-levers; but in my present machine I first set the keys Without moving the levers, and in so doing couple the keys with a vertically-vibrating frame Which is actuated by a hand-lever located at one side of the machine and serves to operate the segment-levers of all the set keys simultaneously and at one operation. The hand-lever, in the same operation in which it causes the actuation of the numeral-wheels, also acts to cause the printing of the figures represented in the keys which were set, the movement of the ink-ribbon, and the feed of the paper. Said lever further assists in the carrying operations.

The invention consists in the novel construction of the devices hereinafter described,

and pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figure 1 is a plan. Fig. 2 is a front elevation; Fig. 3, an elevation of one of the sides; Fig. 4, a central longitudinal vertical section; Fig. 5, an elevation of the other side, and Fig. 6 a rear elevation. Fig. 7 is an enlarged partial vertical longitudinal section. Fig. 8 is a detail section of one of the numeral-wheels and its actuating and controlling devices; Fig. 9, a partial elevation of the same. Fig. 10 is a View similar to Fig. 8, looking in the opposite direction. Fig. 11 is a side view of one of the numeraluvheels. Fig. 12 isapartial horizontal section showing the vibrating frame. Figs. 18 and 14 are detail sections on the lines 13 13 and 14 14 of Fig. 7. Fig. 15 is a perspective of the printing-plunger and adjacent parts. Figs. 16 and 17 are vertical sections Serial No. 552,777. (No model.)

of the hammer and paper-controlling mechanism, showing the parts indifferent positions. Fig. 18 is a plan of the swinging frame for causing the tripping of the hammers. Fig. 19 is a partial vertical section of the rear end of the machine. Fig. 20 is a horizontal section on the line 20 20 of Fig. 16, and Fig. 20 is an enlarged detail perspective of the hammer-pawl. Figs. 21 and 22 are inside face views of the main cam, showing the parts in different positions. Fig. 23 shows the safety-latch for preventin g reversal of motion during a stroke of the hand-lever. Fig 24c is a vertical section showing the paper-guard. Fig. 25 is a front elevation of the ribbon and paper guides. Fig. 26 is a sect-ion on the line 26 26 of Fig. Fig. 27 is a plan of the ribbon-spools and guide. Fig. 28 is a perspective of the impression-strip and frame. Fig. 29 is aperspective of the numeral-wheelcarrying mechanism. Fig. 30 is a sectional View of the same mechanism. In Figs. 2, 3, 5,,and6 the casing is omitted.

In the drawings, X represents the surrounding case of my improved printing and calculating machine. Y Y are side plates supporting most of the parts, and A A are the keys arranged in denominational rows, with nine in each row, in the usual manner. B B are the numeral-wheels, B B the segment-levers pivoted at b and operating the wheels, and B B the pinions meshing with the segment-levers and suitably connected to the wheels so they may serve to rotate them in the forward direction only.

I11 the present invention the segment-levers are not operated immediately by striking, as in former machines patented by me, but instead thereof the depression of the keys is a mere setting operation in which the keys are permitted to descend only a short distance and for a portion only of their stroke, sufficient to bring about engagement with the channel-bars, as hereinafter explained, and in this setting operation the levers which are to be operated are coupled to said bars which form part of a vibrating frame located below the series of segment-levers and adapted to move simultaneously such of them as may correspond to the keys which are set. This frame is composed of aseries of channel-bars C C, one for each row of keys, secured together by cross-bars O C and longitudinal plates C 0 so as to form a rigid and strong structure. The frame is supported upon four horizontal crank-arms, two, C C, of which are mounted upon cross-shaft C under the rear of the frame, and the other two, 0 C are upon a second rocking cross-shaft C, which receives power from shaft C by means of the upstanding armsC one upon each of said shafts, and a bar 0*, connecting the upper ends of said arms. (See Figs. 4, 7, and 12.) The cranks C and C, located at the same side of the machine with said arms C may be and desirably are in one piece with the latter, forming bell-crank levers. The ends of the cranks C and G are pivotally joined to cross-bars C", passing through downward extensions of the longitudinal plates C as seen at Fig. l. It will be seen from this construction that the cranks (J and C will all. move in unison, so that the frame will vibrate up and down without losing its horizontality. Power for giving this movement is applied to the cross-shaft O by the cam C pivoted upon a stud-shaft C inserted in the side plates of the machine, the shaft G having an upstanding arm 0 provided with a pin C which enters a slot 0 in said cam and is forced toward the front of the machine by the turning of the cam. (See Fig. 3.) A hand-lever C is secured to the cam, as shown, and after the proper keys have been set the operator imparts a downward stroke to said hand-lever and thereby operates the cam, which causes the vibrating frame to descend and carry with it the segment-levers whose keys have been set. In so doing the numeral-wheels corresponding to said segment-levers are turned either to show the amount represented by the keys which were set or to add that amount to the amount already represented by the wheels. In addition to this I also, through the same stroke of the hand-lever, cause the actuation of the printing mechanism hereinafter de scribed and record the sum represented in the keys which were set. The segment-levers B are each provided with retractingsprings 0 as seen at Fig. at.

The keys themselves are made the means of carrying motion from the vibrating frame to the segment-levers by the following construction: The stems of the keys are extended downward and passed through openings in the bottom or horizontal web of the channel-bars U, the extension being carried below the lowest plane touched by the vibrating frame in its downward movement. The stems pass down at the sides of the segmentlevers, as at Fig. 13, and above the lovers each key-stem is provided with a lateral offset, projection, or shoulder A, (shown in same ligure,) adapted to bear upon the segmentlever and force it down when the stem is drawn down by the vibrating frame. As the frame always moves to the same extent, the shoulders A upon the key-stems are located in different horizontal planes, so they may come in contact with the segment-levers at an early or late stage in the movement, according to the power of the key. Thus the 0 key will engage the segment-lever very soon after it commences to descend in the setting movement, while the 1 key will not engage until near the close of its stroke. In this manner the proper amount of movement is communicated to the segment-levers. I prefer to form the shoulders by bending the key-stems, as clearly indicated at Fig. 'l 3, that being a very simple operation, and moreover the upper sides of the bends may be made to engage the stops A which hang down from the top of the machine and act to limit the upward movement of the keys received from the retracting-springs A Instead of a bend or offset, the shoulders may obviously be otherwise formed. \Vhen the keys are depressed by hand, their stems are automatically coupled to the vibrating frame by means of the dogs or latches A of which there is one for each key. The dogs or latches are pivoted in channel-bars C, and are actuated bysprings A so that they engage the notches or shoulders A in the key-stems whenever the stems are moved down in the setting operation. The stems are also provided with other shoulders A adapted to engage the bottom of the channel-bars O and to limit the down movement in setting. In Fig. *1- one of the keys is shown as depressed with this shoulder resting against the surface of the channel-bar and with the latch engaging notch A. I prefer that the portion of the stems which passes through and below the channel-bars should be reduced in size from the upper portions, as shown at Fig. 7, and preferably by flattening the same. so as to prevent the key from turning. lVith this construction, when the vibrating frameisforced down the key whose stem is engaged by its latch will be drawn down with the frame, and such key will also cause its corresponding segment -lcver to move with it to the extent necessary to impart an amount of rotation to the nun'ieral-wheel which shall agree with the power of the key.

To release the keys from the vibrating frame, a supplemental light frame, (best shown at Figs.4,7,and 19,) consisting of longitudinal bars I) and cross-wires I), one of the latter being located immediately behind each transverse row of the latches A, is employed, and this frame is supported at one end by arms I) upon the cross-sh aft D", having bearings in the plates 0 of the vibrating frame and at the other end by arms D, pivoted to said plates. The releasing-frame moves with the vibrating frame, being supported upon the latter, but it is also capable of a horizontal motion, which it receives from the rocking of said shaft D, in which it moves the entire series of latches sufficiently to release any of them which may be in engagement with the keys. The rocking of the shaft is due to the crank-arm D upon its outer end, as shown at Fig. 3. This crank-arm has a pin D ,which, when the vibrating frame carries the crankarm and its shaft down, is engaged by the latch Dflstationarily pivoted to the side of the machine. A spring D is attached to the latch and acts to force it into its engaging position whenever the latch is free to yield to it. The crank-arm also carries a pin D which sets under the rearwardly-extending arm D of the latch, and normally holds the latch away from its acting position.

WVith the mechanism just described, and which is most fully shown at Fig. 3, the operation will be as follows: When the vibrating frame moves down, it carries the crankarm D with it and thereby allows the latch D to swing in obedience to its spring D into position, where it will engage the pin D when the parts rise in their return movement. This engagement causes a momentary detention of the outer end of D while the shaft and other parts continue to rise. Thus a slight rocking movement of the shaft ensues, which imparts ahorizontal movement to the releasingframe, whereby the key-coupling latches are released. Before the upward movement has ceased, however, the pin D will carry the arm D to a sufficient height to force the latch away from pin D and thus release the crankarm from the latch. The releasing-frame is also made operable by an independent lever, in order to enable the operator to correct mistakes made in depressing the keys before adding or printing. This lever, which is shown at E, Fig. 3, resembles an inverted T in shape, and is stationarily pivoted at E. One arm of the lever carries a projection E adapted to bear down upon and depress the crank-arm D when the upper end of said lever is moved toward the rear of the machine, such movement releasing the key-coupling. latches and allowing the keys to resume their normal po: sitions, as will be understood from what is written above. A spring E acts on this lever E to draw it toward the front, and a catch E' normally holds the lever in the position shown at Fig. 3. The end of the other arm, E of the lever is rounded, as shown, in order that it may be made to keep the latch D out of engagement with the crank-arm D whenever the operator desires to repeat any number without resetting the keys for such numbers. In order to accomplish this repetition, the operator releases the catch E and the lever immediately swings toward the front of the machine, carrying the rounded end E into posit-ion, where it will prevent the latch D from assuming its operative position. The hand-lever C may, while the latch is thus held, receive any number of strokes desired,

and witheach one it will add and record the sum represented by the set keys without releasing the keys. This release is readily effected at any time, however, by moving the lever E back in the same manneras in releasin g the keys in correcting mistakes in setting.

The catch E is provided with a spring E? for returning it to position, and it is auto matically forced out of the way by lever E when the latter is swung back to release the keys. The vibrating frame is returned to its normal position after each operation by spring 0 attached to one of the upstanding arms 0 The releasing-frame is returned by the springs A which are strained by the horizontal movement of the frame, and the return of the frame causes the rocking of shaft D back to its original position, and the cam O is returned after each stroke of the hand-lever by the spring 0", attached to said cam and the casing.

In order to prevent injury to the apparatus, as well as mistakes, I p ovide a mechanism whereby only full strokes can be given to the hand-lever. In other words, there is no possibility after a stroke in either direction is once begun of reversing the direction of the movement before that stroke is fully completed. This mechanism (fully shown at Fig. 23) consists of the segment 0 upon the rear face of the cam C having fine teeth out in its edge, the projecting dogs 0 at top and bottom of the segment, and a doublepointed pawl O pivoted centrally upon a stationary pivot C and having a stud C projecting from its side face into the path of the dogs 0 and acting with said dogs in re versing the pawl at the end of each up-anddown movement of the segment. One point of the pawl prevents downward movement and the other prevents upward movement, and when the pawl is positioned by either of the dogs and the stud it is retained in the position thus given it by the spring-pressed trigger C located in the rear of the pawl and having a V-shaped point adapted to engage with either side of the similarly-shaped point C upon the rear face of the pawl. Upon the completing of the stroke the pawl is reversed by the contact of the other dog with the stud, and the trigger then acts in a similar manner to hold the pawl in the reversed position.

Corresponding to each segment-lever is a swinging segmental type-head F, which, by the descent of the lever, is lifted into position to present the proper type to the impression devices. 'All the type-heads are loosely supported and swung upon the stationary cross-shaft F, and the connections between them and the levers are suitable for carrying motion from one to the other. These connections desirably consist of links F pivoted at their lower ends to the segment-levers, and

cranks F to which the links are also pivoted at their upper ends. The cranks are rigidly connected to the type-head's, either directly, as in the case of the two cranks and typeheads at the middle of the series, (said two cranks being bent laterally, as shown at Fig. 1,) or indirectly, in the case of the typeheads other than the center ones, by means of a connecting-bar F, rigidly secured in risers or projections F and F, one upon the crank and the other upon the type-head.

G G are the impression-hammers,all loosely hung upon a shaft G", and each is provided with an actuating-sprin g (Jrand a controllingpawl G. Each pawl is likewise provided with a spring G", the tendency of which is to keep the pawl in engagement with the hammer. The hammers are released from their pawls, preparatory to a printing operation, by mechanism as follows: Each of the segment-levers carries a bar or lever ll, (shown at Fig. 4,) extending downwardly and rearwardly in a diagonal direction and pivotally attached to the segment-lever. At itslower end this bar passes between two stationary cross bars or rods I[ 11 which serve as guides in its movements, one being above the bar and the other below it. The underside of the bar is also cut away, so as to form a shoulder at 11 and this shoulder is normally in engagement with a stud ll", carried upon the lower end of an elbow-lever II, pivoted upon the cross-bar II. The descent of the segment will, through the lever II, shoulder 11, and stud 11, cause the elbowlever to rock on its pivot, but before the rocking has proceeded far the stud will slip from under the shoulder and during the remainder of the down movement of lever II it will simply ride on the stud without communicating further motion to the elbow-lever.

The rocking of lever 11, received as just described, carries its upper end inward from the position given at Fig. 4: and into close proximity to the lower end of the corresponding pawl G3 of hammer G. The lever ll. also carries an elbow-like projection 11 (shown at Figs. 16,17, and 18,) the upper point of which engages the rear or cross bar of a swinging frame 11, secured to a rock-shaft 11. when the described inward movement of the upper end of said lever occurs, and thus limits temporarily that movement. In the interior of said swinging frame, and secured to the same rock-shaft therewith, is a comb H, the teeth of which act as guides to the roekin g elbowlever and insure its striking the proper hammer-pawl. The further motion of the elbow, in which it acts to release the pawl, is received from the downward swing of the frame ll", whereby its rear bar, by which the elbowlever was arrested, is carried into the inclined slot ll upon the interior of the elbow projection of lever ll, and this action results in forcing the upper extremity ll. of the lever against the hanuner-pawl and releases the latter, so that the hammer is freed and makes an in'ipression.

The movement of the swinging frame ll and its shaft I]. is received from the main cam 0 through the medium of a slotted lever ll, a stud II upon the cam and working in the slot of the lever, and a crank Il upon the shaft 11 and to which crank the lever is pivoted, as will be understood from Fig. The slot permits the cam-stud to move nearly through its range of oscillation before it will give motion to the shaft 11 so that the frame ll is not actuated until near the conclusion of the downstroke of the handlever. This gives time for the type-heads to arrive at their proper positions before the hammers are released.

The hanuner-pawls are each provided, as shown at Figs -'i-, 6, 20, and 20, with a flange G, which extends laterally to the right and over the next pawl in order upon that side. 3y means of these flanges, when any pawl is released by the mechanism above described it also causes the release of all the pawls in the series lying to the right of the one released by the mechanism, and in this respect these flanges serve the purpose of the flanges designated by the number 91 in my said patent, No. 4165,2535, which is to cause the auto matic printing of the zeros to the right of any pawl released by the operator through one of the levers It.

The paper ribbon or strip \Y is passed, as indicated at Figs. i, 1 and 17, from the spool XV down between the front shield or guide I and rear plates 1 and I, the former being stationary and the pl ate 1 being hinged to the plate I and depending therefrom. The paper then enters first into the bite of the rollers l and I and is deflected by guides 1 around said roller 1 and between it and roller 1'. Roller I is actuated between the successive printing operations by the pawl 1 upon the lever i pivotally joined at its lower end to the main cam and at its upper end to a crank 1 upon the shaft G, and the ratchet disk 1 upon the shaft of the central roller 1. A second pawl I also engages disk 1 and is yieldingly held against it by a spring 1 and serves to prevent over or too free rotation. The actuation of roller 1" draws the paper from the spool and forces it up again past the printing-center, as plainly illustrated, and it may also be actuated independently of the mechanism described by the thumbnut I upon one end of its shaft. At the other end the shafts of rollers I, I, and 1" are provided with inter-meshing gears 1 1 and I, so that the actuation of one gives motion to the other two.

The swinging or hinged plate I is cut away at the printing-center, as shown at 1, Fig. 28, and across this opening I stretch a thin rubber sheet 1 which softens the blow of the hammers against the type, and also improves the character of the impression. The rubber is caught at each end upon the buttons 1 I also move this plate close up against the paper just before the printing takes place by means of a swinging frame, (best seen at Figs. 10 and 17,) consisting of arms 1' upon shaft G and a cross-barl connecting the arms, said shaft being actuated in the early stages of the stroke of hand-lover (1' in a direction which swings plate I and moves it from the position given at Fig. 1b to that given at Fig. 17, thereby forcing the IIO two thicknesses, the up and down courses of the paper, closely together, a desirable result, as better impressions can be obtained usually when two thicknesses of paper in close contact are interposed between the hammer and type than with one. A light spring I retracts the plate after itis released by arms 1 so as to normally keep it out of the Way when puttingin new strips of paper. Thehammers, or such of them as have been released in the printing operation, are, at the conclusion of the printing, returned to their normal positions by the swinging frame 1 1 above described, which extends across the series of hammers, and is actuated in this function by the springs 1 As the frame 1 I returns to its normal position the plate I returns, under the power of the spring 1 to the position shown in Fig. 16. In order that the frame may be swung when the totals are printed, as hereinafter set forth, the lever l is slotted at 1 as shown.

The ink-ribbon J is carried upon spools J, which may be actuated intermittently by any suitable gearing, as, for instance, by mechanism shown at Figs. 3, 4, and 27 and consisting of bevel-gears J J one of which is upon shaft J carrying a ratchet-wheel J receiving motion from the pawl J", borne upon the lever 1 The shaft J 4 is carried by the swinging arms J and is movable by hand, so as to permit it to be brought into engagement with the shaft of either spool, as desired, and J is the lever for changing the engagement from one spool to the other, which it does by lifting or depressing the shaft J the gears J 2 upon the spool-shafts beinglocated in different horizontal planes in the manner indicated at Fig. 11 of my Patent No. 441,232. I have thought it unnecessary to illustrate this ribbon-controlling mechanism fully, as no part of that shown is new at this time.

In the printing of the answers or sums of the numbers added the operator depresses the plunger K. This plunger is located near the front of the machine and is provided with a longitudinal feather K,the lower end of which is normally in engagement with a pin K projecting laterally from the side of a cam K secured upon the end of the rock-shaft K", and through such pin rocks said shaft when the plunger is moved down. Shaft K is angular in cross-section, and when rocked as just stated (and near the beginning of the stroke of the plunger) it acts to force the series of stop-pawls K of which there is one for each numeral-wheel, into locking engagement with the pins B projecting from the sides of the wheels and serving as ratchets whereby the wheels may be moved in carrying by the pawls B mounted upon carrying-levers B and also as a means whereby the wheels may be engaged by the oppositel y-actin g pawls B and B The stop-pawls K are pivoted on the cross-shaft K and are all held normally out of engagement by springs K lVhen the plunger actuates the cam-shaft K", it also moves the adjacent shaft K longitudinally through the engagement of said cam K with a notch in shaft K as will be understood from Figs. 2, 4, and 15, and this longitudinal movement carries the plates K upon said shaft into such position that they look against action the pawls B, whose office it is to carry motion from the pinions B to the numeral-wheels, so that no motion will be given the wheels during the printing operation and while the pawls remain locked. The descent of the plunger also operates a lever K upon shaft K, Fig. 5. This shaft carries a series of arms K one for each segmentlever. Said arms are joined by springs K to their corresponding segment-levers, and when the shaft is rocked by means of the plunger the arms and springs will draw the segment-levers down. This downward in ovement of the segments positions the type-heads, through the medium of links F and cranks F in proper position so they will print the figures corresponding to those indicated by the numeral-wheels at the sight-opening Z. At this time it will be remembered that the numeral-wheels are all locked by their pawls K and the pinions which mesh with the segments and through which the wheels are actuated in their forward rotation are, through the medium of the mechanism such as is shown in Figs. 17, 13, 15, and 10 of my Patent No. 465,255 of December 15, 1891, disengaged from the wheels and allowed to turn with the segments under the power of the springs K until the segments have reached a position corresponding to that of the wheels. Further movement of the pinions and segments is then arrested by the engagement of pawls similar to the pawls 167 of my said patent, with shoulders corresponding to the shoulders 170 of the patent. Any further movement of the arms K will be accommodated by the stretch of springs K More complete details of the plates K and their action are given in the patent to me, No. 465,255, of December 15, 1891. It will be understood that the segment-levers of such of the wheels as stand at Zero are not changed. at the time the answer is printed.

The operation of the segment-levers imparts the initial or positioning movement to the tripping-levers H as already set forth, and by means of the plunger and lever K I also actuate the frame H through which and said tripping-levers the hammers are released and allowed to print. For this latter purpose an upstanding .arm L is applied to the pivoted end of lever K and the upper end of said arm acts as a striker against the depending crank-arm L, upon the end, at the side of the machine (shown at Fig. 5) of the shaft Il and imparts the same move ment to said frame and its shaft as they receive from the actuation of the hand-lever C through the mechanism located upon the opposite side of the machine. A lever L also extends from the pivoted end of lever K to the frame or housing If, in which the hammers are supported, as seen in Fig. 5. This house or frame is provided with depending flanges L", and these are pivoted upon the cross-bar L", supported in the main frame. The front of this housing is given a slight upward movement by the lever 11 at each actuation of the plunger. The purpose of this feature is explained in my application, Serial No. 522,572, filed September 10, 1804:, and is to bring the hammer and type into proper aline ment at the time of making the impression.

Adjacent to each of the stop-pawls K is a slotted link K, whose function it is to draw the stop-pawls K into locking engagement with the mnneral-wheels at the conclusion of the adding operation. To this end each pawl is provided with a pin K, which enters the slot of the link, and thelinksare all joined one to each channel-bar C of the vibrating frame, so they are forced down with said frame. The slots are of such length as to insure their acting upon the pawls at the conclusion of their down movement. In this manner the wheels are prevented from overrotation.

I find it desirable to employ friction-brakes with the numeral-wheels and show such devices at Fig. 8. They are in the form of spring-depressed or weighted levers M, riding upon the tops of the wheels and pivoted on shaft K between the stationary plates M interposed between each pair of segment-levers and supported upon a cross-bar M These brakes exert only the slight power due to their gravity or a suitable spring. They are normally kept out of contact with the wheels and are released for action only at the beginning of each stroke of the hand-lever 0 so that they are all bearing upon the wheels at the time the latter are actuated by the lever, but are lifted so as not to bear on the numeral wheels while they are being turned by the tens-carrying levers. For thus controlling them the following devices are employed: N is a rock-shaft placed in front of the wheels and having a shoulder orfeather N, upon which the forward ends of the brakelevers normally rest, as shown at Figs. 7 and S. A rocking of this shaft lifts and lowers the brake-levers to the extent necessary to relieve the brakes from action or to put them in action, and such rocking motion is derived from the main cam C by means of an elbowlever N actuated by the cam, a link N, and crank N", the latter upon shaft N. A spring N attached to crank N", acts constantly on the shaft N and returnsit to its normal position during the upstroke of hand-lever C The elbow-lever N does not receive its actuation directly from cam C but instead thereof from an auxiliary or movable cam-piece N, pivoted upon the vertical side face of cam C".

The acting face of this cam-piece is nearly vertical at its forward end N and at the beginning of the stroke of the hand-lever the roller N upon the elbow-lever rides up this surface N and the crank N is moved to its farthest extent. Immediately after passing the vertical surface N the roller descends the slope l upon the cam, thereby allowing the spring H to move the crank-arm partially back toward its normal position and thus to rock the shaft N to a slight degree, but not sufficiently to lift the brake-levers from the wheels. The purpose of this partial return rocking of the shaft will be explained lateron. After passing the slope N the roller rides around the long portion N of the cam-piece, but does not there by move the elbowlever, inasmuch as that portion of the cam-piece is concentric with the axis of the main cam. The cam-piece N is retained in its acting position (shown at Fig. 21) during the downstroke of hand-lever C by a pawl N pivoted to the main cam and having a spring N tending to keep the pawl N under the log N of the cam-piece N, thereby holding the cam-pieee N" in its acting position until a stop N secured in the side of the machine, encounters the pawl N near the conclusion of the oscillating movement of the main cam caused by the descent of the hand-lever and forces the pawl from under the leg N so that the cam-piece is then free to swing on its pivot to the position given at Fig. 22. It remains in this position until the return oscillation of the main cam is nearly ended, when the leg N of the cam-piece N encounters another stationary stop N fixed in the side of the machine, which lifts the cam-piece N into its acting position and allows the pawl N to drop into position to hold it there until again released by the pawl N coming into contact with the pin N The rocking shaft N is also given an additional office, which I now describe. It carries a series of projecting pins or stops 0, (shown at Figs. 8, 9, 29, and $30,) one for each tens-carrying lever, and when the shaft is rocked, as already described, these pins are brought against the tens-earrying levers and force them back toward the front of the machine and against the power of their springs B to the position in which they are caught by the spring-aetuated retaii'iing-latches O. The latches hold the levers against action inv the same manner as the like devices act-in my Patent No.465,255 until released from the latches by the cams O borne by the numeralwheels. There is a carrying-lever B for each nu1nerahwheelexcept that the numeral-wheel of the highest order need not be provided with one. Each lever is pivoted upon a shaft l3", and each lever is provided with a pawl 13, which is normally pressed to ei'lgage the pins 13 of the next higher numeral-wheel B by a spring B as best shown in Figs. 7, S, and J.

0 indicates a series of spring-actuated detents, as best shown in Figs. 7 and 0, one for each tens-carrying lever B. Each detent O is pivoted upon a shaft 0 at one end, and has a projection 0' at its other end extendin g over the cam O on the corresponding un- ICC moral-wheel. Each detent is also provided with a latch 0 as best shown in Figs. '7 and 29, adapted to engage with a catch O on its corresponding tens-carrying lever The engagement of a latch O with its carrying-lever holds the latter back against the pressure 'of the spring B until by the rotation of the numeral-wheel the high point on the cam O of the corresponding numeralwheel engages the projection O on the de tent 0, thereby lifting the latch 0 out of engagement with the tens-carrying lever B and allowing the carrying-lever to swing toward the numeral-wheel under the power of its spring 13 The rocking shaft N carries a series of projecting pins or stops 0, (shown at Figs. 8 and 9,) one for each carrying-lever, and when the shaft is rocked these pins are brought against the tens-carrying levers and force them back toward the front of the machine against the power of their springs B to a position in which they are caught by the latches 0 Each latch holds the tenscarrying lever, which it engages from backward movement under the power of said spring, until released from its retaining-latch by the cam 0 borne by the numeral-wheel.

As already explained, the rocking motion of the shaft N is derived from the main cam 0 by means of the elbow-lever N actuated by the cam, a link N and crank N, the latter fast on the shaft N, while the elbow-lever N receives its actuation from an auxiliary or movable cam-piece N pivoted upon the vertical side face of cam (3 having a nearly vertical forward end N upon which at the beginning of the stroke of the hand-lever the roller N of the elbow-lever rides, and the crank N is moved to its farthest extent, causing the pins 0 on the rock-shaft N to press against the tens-carrying levers and force them back toward the front of the machine.

As already described, the shaft N is partially returned toward its normal position immediately after receiving its full rocking movement and before the hand-lever C has completed its downstroke, and in its partial return the pins 0 fall away from the tenscarrying levers B a short distance, so that when any latch or latches O are forced out of engagement with a lever or levers such lever or lovers will swing under the power of their springs B until they encounter said pins 0 in the intermediate position of the latter, as shown at Fig. 7. This is but a limited movement, but is suflicient to prevent rengagement with the latches. As the main cam nearly completes its oscillation, the stop-pin N engages the pawl N and forcesit out from under the leg N of the cam-piece N allowing the latter to drop down past the face of the main cam, and on the upstroke of the hand-lever the lever-roller N rides upon the edge of the main cam down the inclined part N thus allowing the pins 0 to swing fart-her away from the tens carrying levers, permitting those which have been released from the retaining-latch to swing forward under the power of their springs B and through the pawls B each advances a numeral-wheel one tooth, thus effecting the carrying of the tens. The stop-pin N may be employed, if desired, to limit the movement of the pawl N By the construction detailed the carrying is postponed and does not take place until after the upstroke of the hand-lever has commenced, and not until the numeralwheels have been released from the locking action of the stop-pawls upon the raising of the vibrating frame 0 O and the slotted links K lVhen adding a long list of figures or sums, the rising end of the paper containing the numbers becomes extended for a considerable distance above the machine and is liable to bend over toward the front of the machine and cover some of the keys. To prevent this, I provide the machine with a movable guard P, preferably made of wire bent into U form, which can be readily lifted by the operator into position in front of the papers, as seen at Figs. 2, 4, and 24, whenever necessary. A spring-catch P engages the guard by entering a notch at P near the foot thereof, and holds it when lifted to its acting position. The automatic release of this device is desirable, as when raised it is so near the paper as to interfere somewhat with the tearing off of the part containing the printed numbers, and hence I mount the catch upon one of the arms K already described, and incline the under side of its acting point, as seen at P so that when the supporting-arm is moved down in obedience to the plunger of the answer-printing mechanism the inclined side P will be drawn against the stationary guide P located near the top of the catch, and force the catch out of its engagement with the guard.

By this means the guard is permitted to fall by its gravity to the position in which it is shown at Figs. 3 and 5. The frame 1 I whereby the hammers are reset and the paper-moving plate I is actuated, is also operated in printing the answers by the slotted lever Q, pivoted to lever K and a crank Q upon the shaft G, carrying the frame. The slot Q in the lever permits the operation of the frame by the impulse derived from lever O in the same manner as slot I in lever 1 permits the frame to move with lever Q. This will be understood readily from Figs. 3 and 5.

For the purpose of regulating the tension of the hammer-springs I attach those springs 6, 16, and 17.) The paper-spool is supported upon a threaded shaft TV and upon which it may be adjusted laterally. This shaft is let into a stationary bearing-block TV in the outside frame at one end, and at the other end a thimble \V is slipped upon it. This thimble is movably inserted in a sleeve \V, supported in the frame X, and both it and the sleeve have opposing shoulders, between which a spring is confined. \Vith this construction, which fully shown at Fig. 6, the thimble and shaft are constantly forced toward the stationary bearing by the spring, but the spring allows the shaft to be moved far enough away from the stationary bearing to draw it from that bearing whenever a fresh spool of paper is to be placed on the shaft.

I claim 1. The combination in a calculati11g1nachine of a denominational numeral-wheel, a series of denominational keys corresponding to said wheel, a device for actuating said wheel, a vibrating frame normally detached from said wheel-actuatin g device and serving to give motion to it when coupled thereto, means independent of the keys for actuating said frame, and means whereby the operator can couple said wheel-actuating device to said frame at will, substantially as specified.

2. The combination in a calculating-machine of the numeral-wheels each representing one denomination, devices for actuating the wheels, a vibrating frame normally detached from said wheel-actuating devices but common to all of them and serving to give motion to them when coupled thereto, and keys whereby the operator may attach the actuating devices of any wheel to said frame at will, substantially as specified.

3. The combination in a calculating-machine of the numeral-wheels, devices for actuating the wheels, a vibrating frame nor mally detached from said wheel-actuating devices and serving to give motion to them when coupled thereto, keys whereby the actuating devices of any wheel may be attached to said frame at will, and devices independent of the keys for releasing such attachment, substantially as specified.

f. The combination in a calculating-machine of the keys, the numeral-wheels, and the wheel-actuating devices, with a vibrating frame for giving motion to said actuating devices, the keys themselves serving as a means whereby the wheel-actuating devices are attached to said frame, substantially as specified.

5. In a calculating-machine, the combina tion with the nu meral-wheels and their operating segment-levers, of movable keys for actuating the levers, a vibrating frame for actuating the keys, and means for coupling the keys to the frame, substantially as specifled.

6. In a caleulating-machine, the combination with the keys, the numeralwheels, and their operating segment-levers, of a vibrating frame, means independent of the keys for operating the frame, and means forcimpling the levers to the frame, substantially as specitied.

7. The combination in a calculating-machine, of the numeral-wheels and their segmcnt-lcvers, a vibrating frame, and the keys, the latter serving to couple the frame to the levers, and the frame acting when thus coupied to actuate the levers, substantially as specified.

8. The combination with the segment-levers, and the vibrating frame, of keys having projections or shoulders for engaging the levers, means for coupling the keys to the frame, and means independent of the keys for operating said frame, substantially as specified.

9. The combination with the segment-levers and vibrating frame, of keys set by de pressing them through a portion of their stroke, said keys having projections or shoulders for engaging the lovers, and 'means for coupling the keys when they are set to the frame, substantially as specified.

10. The combination of the segment-levers and the vibrating frame, of the keys set by depressing them through a portion of their stroke, said keys having projections or shoulders for engaging the lovers, means for coup ling the keys when they are set to the frame, and means for releasing the keys from the frame, substantially as specified.

ll. The combination with the segment-levers and the vibrating frame, the keys for engaging the levers, and spring-latches for attaching the stems of the keys to the frame, substantially as specified.

12. The combination with the segment-levers and the vibrating frame, of the keys for engaging the levers, spring-latches for attaching the stems of the keys to said :f ram e, and a movable frame for releasing the latches, substantially as specified.

3. The combination with the segment-lo vers and the vibrating frame, of the keys for engaging the levers, spring-latches for attaching the stems of the keys to the frame, and a movable device borne upon the vibrating frame and acting to release the latches, substantially as specified.

1t. The combination with the segment-levers and the vibrating frame of the keys for engaging the levers, spring-latches for attaching the stems of the keys to said vibrating frame, a releasing frame for releasing the latches, means for actuating the releasingframe, and means for actuating the vibrating frame, substantially as specified.

15. The combination with the scgmentlcvers and the vibrating frame, of the keys for engaging the levers, spring-latches for attach ing the stems of the keys to the frame, and a horizontally-movable frame for releasing the latches, substantially as specified.

16. The combination with the segment-levers and the vibrating frame, of the keys for en gaging the lovers, sprin g-latches for attach- IIC 

